Method handleVideoConversion

convert/convert.ts:324–415

(msg: Api.Message, args: string[])

    if (!client || !reply || (!reply.document && !reply.video)) {
      await msg.edit({ text: `❌ <b>使用错误</b>\n\n请回复一个视频消息后再使用此命令。\n\n请回复一个视频消息后再试。`, parseMode: "html" });
      return;
    }
    
    const doc = reply.video || reply.document;
    const fileNameAttr = doc?.attributes?.find((a: any) => a.fileName) as Api.DocumentAttributeFilename | undefined;
    const originalFileName = fileNameAttr?.fileName || "video.mp4";

    await msg.edit({ text: "📥 正在下载视频...", parseMode: "html" });
    
    const timestamp = Date.now();
    const tempVideoPath = path.join(converter.tempDir, `${timestamp}_video`);
    const tempAudioPath = path.join(converter.tempDir, `${timestamp}.mp3`);
    let finalAudioPath = tempAudioPath;
    let tempCoverPath: string | undefined;

    try {
        await client.downloadMedia(reply, { outputFile: tempVideoPath });
        if (!fs.existsSync(tempVideoPath)) throw new Error("视频下载失败");

        await msg.edit({ text: "🔄 正在转换为 MP3...", parseMode: "html" });
        if (!await converter.convertVideoToMp3(tempVideoPath, tempAudioPath)) {
            throw new Error("视频转换失败，请检查 FFmpeg 是否已安装");
        }

        const useAi = (args[0] || "").toLowerCase() === 'u';
        const userQuery = useAi ? args.slice(1).join(' ') : args.join(' ');
        
        let audioFileName: string;
        let songInfo: SongInfo = { title: "", artist: "", album: "" };

        if (useAi && userQuery) {
            const apiKey = GeminiConfigManager.get(GEMINI_API_KEY);
            if (!apiKey) throw new Error(`Gemini API Key 未设置。\n请使用 <code>${mainPrefix}convert apikey &lt;key&gt;</code> 命令设置。`);

            await msg.edit({ text: "🤖 AI 正在识别歌曲信息...", parseMode: "html" });
            const gemini = new GeminiClient(apiKey);
            const aiResponse = await gemini.searchMusic(userQuery);
            songInfo = extractSongInfo(aiResponse, userQuery);

            await msg.edit({ text: `🎵 AI 识别结果:\n<b>歌名:</b> ${htmlEscape(songInfo.title)}\n<b>歌手:</b> ${htmlEscape(songInfo.artist)}\n\n正在查找封面...` , parseMode: "html"});
            
            tempCoverPath = path.join(converter.tempDir, `${timestamp}.jpg`);
            const coverFound = await searchAndDownloadCover(`${songInfo.title} ${songInfo.artist}`, tempCoverPath);
            if (!coverFound) tempCoverPath = undefined;
            
            await msg.edit({ text: "✍️ 正在写入元数据...", parseMode: "html" });
            const tempFinalAudioPath = path.join(converter.tempDir, `${timestamp}_final.mp3`);
            if (await converter.addMetadataAndCover(tempAudioPath, tempFinalAudioPath, songInfo, tempCoverPath)) {
                finalAudioPath = tempFinalAudioPath;
            }
            audioFileName = `${converter.safeFilename(songInfo.title)} - ${converter.safeFilename(songInfo.artist)}.mp3`;

        } else if (userQuery) {
            audioFileName = `${converter.safeFilename(userQuery)}.mp3`;
            songInfo.title = userQuery;
        } else {
            audioFileName = `${converter.safeFilename(originalFileName.replace(/\.[^.]+$/, ""))}.mp3`;
            songInfo.title = originalFileName.replace(/\.[^.]+$/, "");